9665813208 has 32 divisors (see below), whose sum is σ = 24324572160. Its totient is φ = 3200599200.

The previous prime is 9665813203. The next prime is 9665813239. The reversal of 9665813208 is 8023185669.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665813203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329960 + ... + 1337207.

It is an arithmetic number, because the mean of its divisors is an integer number (760142880).

Almost surely, 2^9665813208 is an apocalyptic number.

It is an amenable number.

9665813208 is an abundant number, since it is smaller than the sum of its proper divisors (14658758952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9665813208 is a wasteful number, since it uses less digits than its factorization.

9665813208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667327 (or 2667323 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 9665813208 is about 98314.8676854117. The cubic root of 9665813208 is about 2130.1628159171.

The spelling of 9665813208 in words is "nine billion, six hundred sixty-five million, eight hundred thirteen thousand, two hundred eight".